56605611558 has 64 divisors (see below), whose sum is σ = 122448568320. Its totient is φ = 17400384672.

The previous prime is 56605611551. The next prime is 56605611563. The reversal of 56605611558 is 85511650665.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56605611551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 369433 + ... + 499691.

It is an arithmetic number, because the mean of its divisors is an integer number (1913258880).

Almost surely, 2^56605611558 is an apocalyptic number.

56605611558 is an abundant number, since it is smaller than the sum of its proper divisors (65842956762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56605611558 is a wasteful number, since it uses less digits than its factorization.

56605611558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130401.

The product of its (nonzero) digits is 1080000, while the sum is 48.

The spelling of 56605611558 in words is "fifty-six billion, six hundred five million, six hundred eleven thousand, five hundred fifty-eight".